3 files changed, 4 insertions, 4 deletions
diff --git a/packages/order-utils/src/order_hash.ts b/packages/order-utils/src/order_hash.ts
index 8da11c596..1cde72a73 100644
--- a/packages/order-utils/src/order_hash.ts
+++ b/packages/order-utils/src/order_hash.ts
@@ -16,7 +16,7 @@ const INVALID_TAKER_FORMAT = 'instance.taker is not of a type(s) string';
  * expects values of Solidity type `uint` to be passed as type `BN`.
  * We do not use BN anywhere else in the codebase.
  */
-function bigNumberToBN(value: BigNumber) {
+function bigNumberToBN(value: BigNumber): BN {
     return new BN(value.toString(), 10);
 }
 
diff --git a/packages/order-utils/test/signature_utils_test.ts b/packages/order-utils/test/signature_utils_test.ts
index ede681619..553ec2e53 100644
--- a/packages/order-utils/test/signature_utils_test.ts
+++ b/packages/order-utils/test/signature_utils_test.ts
@@ -106,7 +106,7 @@ describe('Signature utils', () => {
             };
 
             const fakeProvider = {
-                async sendAsync(payload: JSONRPCRequestPayload, callback: JSONRPCErrorCallback) {
+                async sendAsync(payload: JSONRPCRequestPayload, callback: JSONRPCErrorCallback): Promise<void> {
                     if (payload.method === 'eth_sign') {
                         const [address, message] = payload.params;
                         const signature = await web3Wrapper.signMessageAsync(address, message);
@@ -137,7 +137,7 @@ describe('Signature utils', () => {
                 s: '0x7feabdfe76e05924b484789f79af4ee7fa29ec006cedce1bbf369320d034e10b',
             };
             const fakeProvider = {
-                async sendAsync(payload: JSONRPCRequestPayload, callback: JSONRPCErrorCallback) {
+                async sendAsync(payload: JSONRPCRequestPayload, callback: JSONRPCErrorCallback): Promise<void> {
                     if (payload.method === 'eth_sign') {
                         const [address, message] = payload.params;
                         const signature = await web3Wrapper.signMessageAsync(address, message);
diff --git a/packages/order-utils/test/utils/chai_setup.ts b/packages/order-utils/test/utils/chai_setup.ts
index 078edd309..1a8733093 100644
--- a/packages/order-utils/test/utils/chai_setup.ts
+++ b/packages/order-utils/test/utils/chai_setup.ts
@@ -4,7 +4,7 @@ import ChaiBigNumber = require('chai-bignumber');
 import * as dirtyChai from 'dirty-chai';
 
 export const chaiSetup = {
-    configure() {
+    configure(): void {
         chai.config.includeStack = true;
         chai.use(ChaiBigNumber());
         chai.use(dirtyChai);